Optical time-domain reflectometer



FIG. 1 is a front view of an optical time-domain reflectometer showing my new design;

FIG. 2 is a rear view thereof;

FIG. 3 is a left view thereof;

FIG. 4 is a right view thereof;

FIG. 5 is a top view thereof;

FIG. 6 is a bottom view thereof; and,

FIG. 7 is a perspective thereof. 

CLAIM The ornamental design for an optical time-domain reflectometer, as shown and described. 